Ingredients
- 175g softened butter, plus extra for greasing
- 175g caster sugar
- 3 medium eggs
- 175g self-raising flour
- 1 tsp baking powder
- 2 egg whites
- 100g caster sugar
- 3 tsp instant coffee granules
- 25g chopped walnuts
- 100g softened butter
- 50g icing sugar, sifted
- 3 tbsp icing sugar